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Finding the Fourth Proportional to 486,501.90, 729,752.85 and 318,540.30

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Solution

The fourth proportional to 486,501.90, 729,752.85 and 318,540.30 is: 477,810.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,501.90 : 729,752.85 = 318,540.30 : x
  2. Step 2: Convert to fraction form
    486,501.90/729,752.85 = 318,540.30/x
  3. Step 3: Cross multiply
    486,501.90x = 729,752.85 × 318,540.30
  4. Step 4: Simplify right side
    486,501.90x = 232,455,691,764.86
  5. Step 5: Solve for x
    x = 232,455,691,764.86/486,501.90
  6. Step 6: Final answer
    x = 477,810.45

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.